Some guy from here in the UK has made this debunking of CIT. It's a very good analysis of their methods and distortions. He does an amazing job at analysing Roosevelt Roberts' testimony in part 2, and even uses a flight simulator in Part 4 to prove that a north side impact may be possible.
National Geographic, Muse, Internet Censorship, Sibel Edmonds, Invisible Empire, 911-DIS.INFO and the Union of Truthers and Debunkers
Not All Debunking Is Created Equal
Dawn Vignola’s Account vs. CIT’s Methods by Erik Larson
Scootle's CIT Deception Mock Trailer